A urinary tract infection (UTI) affects the urinary system, most notably the urethra. Symptoms might include an increased urge to urinate, accompanied by a burning sensation; urine might be cloudy or bloody. Among adults, UTIs are 50 times more common in people with vaginas than in people with penises, probably due to the shorter distance bacteria travel from the bowel. If you have a vagina, there is more than a 50 percent chance that you’ll have at least one UTI in your lifetime. And, if you’re unlucky enough to be in this group, there’s a 20 percent chance that you’ll develop recurrent UTIs (three or more infections yearly). Annually, UTIs prompt an estimated 8 million visits to health-care providers, costing at least $1 billion.

How can urinary tract infections be prevented?

Although symptoms often recede without medical intervention, it’s important to seek treatment for persistent UTIs because the infection could spread. If you are or have been sexually active, it is also important to ensure you don’t actually have a sexually transmitted disease.

Causes of UTIs

When certain species of fecal bacteria wend their way from the bowel into your urethra, they might initiate an infection. Up to 90 percent of UTIs are caused by certain strains of Escherichia coli; the rest are caused by Staphylococcus saprophyticus, Proteus mirabilis, Klebsiella pneumoniae, and a few other species. Continue reading →

Cranberry products have a reputation for fighting urinary tract infections. But is this reputation deserved? Image: FreeDigitalPhotos

An increased urge to urinate. A burning sensation when you do. These are two of the signs of a urinary tract infection (UTI), an incredibly unpleasant condition that can seem to come out of nowhere. Anyone can get a UTI, but among adults they are about 50 times more common in females than in males. Certain microorganisms cause these infections, often when bacteria from feces are introduced into the urinary tract. Although symptoms often clear up without medical intervention, it is very important to seek treatment for a persistent UTI because the infection could spread and become much more serious. (If you are or have been sexually active, it is also important to make sure you don’t actually have a sexually transmitted infection.)

Cranberry products — either as juice (sweetened, unsweetened, or blended with other fruit juices) or capsules — are considered by many to be an effective home remedy for UTIs. While cranberries are a well-known and accessible treatment, the evidence for their efficacy is not very strong. Why, then, are they such a popular treatment? It could be due simply to the placebo effect, an amazing phenomenon in which our expectations help shape our experiences. It could be that symptoms often clear up on their own, but we attribute our improvement to whatever remedies we happened to be trying at the time. It could be that drinking extra fluids (e.g., cranberry juice) helps flush the bacteria from our bodies as we urinate more. Or, it’s possible that cranberries do help clear up UTIs, but we just don’t have solid evidence yet. Continue reading →